In Nepali grammar, nouns play a vital role as they function as the building blocks of sentences. They are the words that name people, places, things, ideas, and qualities. The theory of nouns in Nepali grammar is centered around their classification and usage.

Nepali nouns can be categorized into various groups based on their gender, number, and case. Gender is an essential aspect, as nouns are either masculine or feminine. Number refers to whether a noun is singular or plural. Additionally, nouns are used in four different cases: subjective, objective, possessive, and vocative. The case determines the grammatical role of the noun in a sentence.

Furthermore, Nepali nouns also adhere to a unique format when used in conjunction with adjectives. The grammatical agreement between gender and number of nouns and adjectives is vital.

Understanding the theory of nouns in Nepali grammar is crucial for effective communication. Mastery of this theory allows speakers to construct accurate sentences and convey their thoughts clearly.